

FOLLOWUS
College of Polymer Science and Engineering, Sichuan University, State Key Laboratory of Polymer Materials Engineering, Chengdu 610065, China
fengchen@scu.edu.cn (F.C.)
qiangfu@scu.edu.cn (Q.F.)
Received:27 January 2019,
Revised:2019-3-26,
Accepted:28 March 2019,
Online First:27 May 2019,
Published:2019-08
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Mo, Y. L.; Tian, Y. X.; Liu, Y. H.; Chen, F.; Fu, Q. Preparation and properties of ultrathin flexible expanded graphite film via adding natural rubber. Chinese J. Polym. Sci. 2019, 37, 806–814.
Yan-Ling Mo, Yu-Xin Tian, Yu-Hang Liu, et al. Preparation and Properties of Ultrathin Flexible Expanded Graphite Film
Mo, Y. L.; Tian, Y. X.; Liu, Y. H.; Chen, F.; Fu, Q. Preparation and properties of ultrathin flexible expanded graphite film via adding natural rubber. Chinese J. Polym. Sci. 2019, 37, 806–814. DOI: 10.1007/s10118-019-2264-6.
Yan-Ling Mo, Yu-Xin Tian, Yu-Hang Liu, et al. Preparation and Properties of Ultrathin Flexible Expanded Graphite Film
Expanded graphite (EG) films exhibit potential use in a wide field including thermal management
conductive applications
and electromagnetic interference (EMI) shielding. However
their poor tensile strength and brittleness are crucial deficiencies for commercial applications. To address these defects
in our work
natural rubber (NR) is employed to improve EG films for better mechanical strength and flexibility. The origin of the strengthening effect of EG films by the addition of natural rubber mainly arises from the formation of a simulate shell structure. Compared to the neat EG films
the addition of merely 2 wt% NR can give rise to superior ductility. Further
the loading of 10 wt% NR realizes a significant mechanical enhancement of the EG/NR films
i.e
.
2.4 and 11.4 times increase in tensile strength and elongation at break
respectively. Besides
EG/NR films containing 10 wt% NR can still sustain excellent thermal and electric conductivities of 173 W·m
−1
·K
−1
and 75 S·cm
−1
respectively. Furthermore
a very high EMI of 41.4 dB is achieved as the film thickness reaches 50 μm. Thus
the lightweight EG/NR films with comprehensive performance as well as their virtue of green and simple large-scale preparation endow them with the possibility of designing next-generation flexible electronics.
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